Hach-Lange POLYMETRON 9245 User Manual - Manual (Page 92)

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Calibration
8.5 Automatic calibration setup
Select the AUTO. CAL. SETUP option to access its sub-menu
and set the calibration parameters.
This allows the analyzer to be automatically calibrated at
pre-defined and regular intervals.
The process is the same as described in Calibrate known
addition on page 86 except it is initiated automatically at the
pre-defined time.
Turn the automatic calibration on or off by selecting Yes or No
as appropriate.
Note that even if this is set to Yes, it is still possible to
calibrate the analyzer manually if required.
CAL.SOL defines the concentration of the calibration solution.
Refer to Calibration solution concentrations on page 85 for
information regarding the concentration of the calibration
solution.
MODE can either be set up to a fixed date or to a specified
Frequency .
If the mode is set to fixed date, enter the day(s) of the WEEK
when the calibration will be performed. Set the day to an
asterisk to skip that day.
Set the HOUR field (HH:MM:SS format on a 24 hour clock) to
the time the automatic calibration should start.
In the illustration left, a calibration is set to start on a fixed
time scale and will begin every Monday, Wednesday and
Friday at 19:30 in the evening.
If the mode is set to frequency, then the week and hour data
fields will be replaced by a TIME PERIOD field. Enter the
calibration frequency in hours into this field.